package com.sky.aspect;


import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.entity.Employee;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.apache.xmlbeans.InterfaceExtension;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Slf4j
@Component
public class AutoFillAspect {

    /**
     * 切入点
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPoint(){}

    /**
     * 前置通知，在通知中进行公共字段的赋值
     */
    @Before("autoFillPoint()")
    public void autoFill(JoinPoint joinPoint) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
        log.info("开始进行公共字段自动填充。。。。。。");
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        //获取当前拦截的方法上数据库的操作类型
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType value = autoFill.value();
        //获取被拦截方法的参数-实体对象
        //约定：定义参数的时候，实体类放在第一位
        Object[] args = joinPoint.getArgs();
        if(args==null||args.length==0){
            return ;
        }
        Object entity = args[0];
        //根据不同的操作类型，为对应的属性通过反射来赋值
        if(value==OperationType.INSERT){
            Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
            Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
            Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
            Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
            setUpdateTime.invoke(entity,LocalDateTime.now());
            setUpdateUser.invoke(entity, BaseContext.getCurrentId());
            setCreateTime.invoke(entity,LocalDateTime.now());
            setCreateUser.invoke(entity,BaseContext.getCurrentId());
        }
        else if(value==OperationType.UPDATE){
            Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
            Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
            setUpdateTime.invoke(entity,LocalDateTime.now());
            setUpdateUser.invoke(entity, BaseContext.getCurrentId());
        }

    }
}
